Fig. 2.

Hypothetical models of trans-activation and cis-activation. (A) The exodomain complexed with hormone intramolecularly modulates its own endodomain (cis-activation), and (B) intermolecularly modulates unoccupied receptor (trans-activation).

Hypothetical models of trans-activation and cis-activation. (A) The exodomain complexed with hormone intramolecularly modulates its own endodomain (cis-activation), and (B) intermolecularly modulates unoccupied receptor (trans-activation).